C#

using System;
using System.Collections.Generic;
using System.Collections;
using System.Text;
using System.IO;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;
using System.ComponentModel;
using System.Data;
using System.Drawing;


/// <summary>
/// Summary description for Class1
/// </summary>
public class Class1
{
    public Class1()
    {
    }

    public ArrayList SerialPortContainer = new ArrayList();

    private string config_file = "C:/achu/config.txt";
    private string PhoneNumber;
    private string ServiceCentre;



    public bool test()
    {
        try
        {
            //SerialPort serialPort1 = new SerialPort();
            
            string line;
            //string file = "C:/achu/config.txt";
            TextReader tr = new StreamReader(config_file);
            System.IO.StreamReader objReader;
            objReader = new System.IO.StreamReader(config_file);
            int NumberOfLines = 0;

            while ((line = tr.ReadLine()) != null)
            { 
                NumberOfLines++;
            }


            string[] ListLines = new string[NumberOfLines];

            for (int i = 0; i < NumberOfLines; i++)
            {
                ListLines[i] = objReader.ReadLine();
                //MessageBox.Show(Convert.ToString(ListLines[i]));

                
                string[] values = ListLines[i].Split(new char[] { '$', '#' });
                string[] PortSplit = values[0].Split(new char[] { ':', '#' });

                string PortName = PortSplit[1];
                

                
                //********Reading Baud Rate*********

                string[] BaudSplit = values[1].Split(new char[] { ':', '#' });
                //string BaudRateValue = BaudSplit[1];
                int BaudRate = Convert.ToInt32(BaudSplit[1]);
                
                //******READING DATA BITS**********
                string[] BitsSplit = values[2].Split(new char[] { ':', '#' });
                int DataBits = Convert.ToInt32(BitsSplit[1]);
                               

                //********READING SIM PHONE NUMBER********
                string[] NumberSplit = values[3].Split(new char[] { ':', '#' });
                PhoneNumber = NumberSplit[1];
                 

                
                //******READ SERVICE CENTRE NUMBER*********
                string[] SerNumberSplit = values[4].Split(new char[] { ':', '#' });
                ServiceCentre = SerNumberSplit[1];
                
                //******Setting Modem Configuration********
                SerialPort serialPort1 = new SerialPort();
                serialPort1.PortName = PortName;
                serialPort1.Handshake = Handshake.RequestToSend;
                serialPort1.BaudRate = BaudRate;
                serialPort1.DataBits = DataBits;
                serialPort1.Parity = Parity.None;
                serialPort1.StopBits = StopBits.One;
                serialPort1.DtrEnable = true;
                serialPort1.Open();
                //serialPort1 = new SerialPort();
                
                SerialPortContainer.Add(serialPort1); 
 //i want to call the above array values later in the below method called ATTest() to cal the configuration and do someting
                
              //  MessageBox.Show(Convert.ToString(SerialPortContainer.Count));
               // MessageBox.Show(Convert.ToString(SerialPortContainer[i]));

            }//end while
                
            
        }//end try
       catch (Exception ex)
        {

           MessageBox.Show(ex.Message);
            return false;
        }
        return true;
    }

    public void ATTest()
    {
        string val = Convert.ToString(SerialPortContainer[1]);
        MessageBox.Show(val);
    }

}